Head-mounted display device



FIG. 1 is a front perspective view of a head-mounted display device showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a top rear perspective view thereof; and,

FIG. 9 is a bottom rear perspective view thereof.

The broken lines in the figures depict portions of the head-mounted display device which form no part of the claimed design. 

CLAIM We claim the ornamental design for a head-mounted display device, as shown and described. 